Fixes #51 - all-day-events
Updates gradle and gradle android version.
Merge pull request #115 from schmaller/master

Fixes #51 - all-day-events
Updates build tools to 19.1.
Updates android build tools gradle plugin to 0.11.+.
Updates app version to 1.8.4.
Adds translations for greek, romanian and portuguese and updates other translations.
Formats resource files.
Updates README for 1.8.4 release.
Shuffles change entries from 1.8.4 release around.
Update README.md
Fixes #117. Reverts #115 as it causes all day events to appear one day off.
Updates version to 1.8.5.
Update README.md

Updates README for 1.8.5 release.